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From: Guo Ren <guoren@kernel.org>
To: "Jernej Škrabec" <jernej.skrabec@gmail.com>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
	"Anup Patel" <anup.patel@wdc.com>,
	"Palmer Dabbelt" <palmerdabbelt@google.com>,
	"Chen-Yu Tsai" <wens@csie.org>,
	"Maxime Ripard" <maxime@cerno.tech>,
	"Drew Fustini" <drew@beagleboard.org>,
	liush@allwinnertech.com, "Wei Wu (吴伟)" <lazyparser@gmail.com>,
	wefu@redhat.com, linux-riscv <linux-riscv@lists.infradead.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	linux-arch <linux-arch@vger.kernel.org>,
	linux-sunxi@lists.linux.dev, "Maxime Ripard" <mripard@kernel.org>,
	"Corentin Labbe" <clabbe@baylibre.com>,
	"Samuel Holland" <samuel@sholland.org>,
	"Icenowy Zheng" <icenowy@aosc.io>,
	"LABBE Corentin" <clabbe.montjoie@gmail.com>,
	"Michael Walle" <michael@walle.cc>,
	"Guo Ren" <guoren@linux.alibaba.com>
Subject: Re: [RFC PATCH v2 11/11] riscv: soc: Allwinner D1 GMAC driver only for temp use
Date: Mon, 7 Jun 2021 00:53:17 +0800	[thread overview]
Message-ID: <CAJF2gTTChtcDaznZSRvU6TvknkCH=St8Fv9Eux1tJDy+s1AagQ@mail.gmail.com> (raw)
In-Reply-To: <811499816.OAcyhOWOk8@jernej-laptop>

On Mon, Jun 7, 2021 at 12:32 AM Jernej Škrabec <jernej.skrabec@gmail.com> wrote:
>
> Dne nedelja, 06. junij 2021 ob 18:16:44 CEST je Arnd Bergmann napisal(a):
> > On Sun, Jun 6, 2021 at 11:04 AM <guoren@kernel.org> wrote:
> > > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > > b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts index
> > > cd9f7c9..31b681d 100644
> > > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > > @@ -11,7 +11,7 @@
> > >
> > >         compatible = "allwinner,d1-nezha-kit";
> > >
> > >         chosen {
> > >
> > > -               bootargs = "console=ttyS0,115200";
> > > +               bootargs = "console=ttyS0,115200 rootwait init=/sbin/init
> > > root=/dev/nfs rw nfsroot=192.168.101.200:/tmp/rootfs_nfs,v3,tcp,nolock
> > > ip=192.168.101.23";
> > These are not board specific options, they should be set by the bootloader
> > according to the network environment. It clearly doens't belong
> > into this patch .
> >
> > >                 stdout-path = &serial0;
> > >
> > >         };
> > >
> > > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > > b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi index 11cd938..d317e19
> > > 100644
> > > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > > @@ -80,5 +80,21 @@
> > >
> > >                         clocks = <&dummy_apb>;
> > >                         status = "disabled";
> > >
> > >                 };
> > >
> > > +
> > > +               eth@4500000 {
> > > +                       compatible = "allwinner,sunxi-gmac";
> > > +                       reg = <0x00 0x4500000 0x00 0x10000 0x00 0x3000030
> > > 0x00 0x04>; +                       interrupts-extended = <&plic 0x3e
> > > 0x04>;
> > > +                       interrupt-names = "gmacirq";
> > > +                       device_type = "gmac0";
> > > +                       phy-mode = "rgmii";
> > > +                       use_ephy25m = <0x01>;
> > > +                       tx-delay = <0x03>;
> > > +                       rx-delay = <0x03>;
> > > +                       gmac-power0;
> > > +                       gmac-power1;
> > > +                       gmac-power2;
> > > +                       status = "okay";
> > > +               };
> >
> > Before you add this in the dts file, the properties need to be documented in
> > the binding file. The "allwinner,sunxi-gmac" identifier does not appear to
> > be specific enough here, and the properties don't match what dwmac uses,
> > which would make it unnecessarily hard to change to the other driver later
> > on without breaking compatibility to old dtb files.
> >
> > > +++ b/drivers/net/ethernet/allwinnertmp/sunxi-gmac-ops.c
> > > @@ -0,0 +1,690 @@
> > > +/*
> > > + * linux/drivers/net/ethernet/allwinner/sunxi_gmac_ops.c
> > > + *
> > > + * Copyright © 2016-2018, fuzhaoke
> > > + *             Author: fuzhaoke <fuzhaoke@allwinnertech.com>
> > > + *
> > > + * This file is provided under a dual BSD/GPL license.  When using or
> > > + * redistributing this file, you may do so under either license.
> >
> > Are you sure this is the correct copyright information and "fuzhaoke" is
> > the copyright holder for this file? If this is derived from either the
> > designware
> > code or the Linux stmmac driver, the authors should be mentioned,
> > and the license be compatible with the original license terms.
> >
> > Andre already commented on the driver quality and code duplication, those
> > are also show-stoppers, but the unclear license terms and dt binding
> > compatibility are even stronger reasons to not get anywhere close to this
> > driver.
>
> I got impression that this patch is not meant to be merged and it's forward
> ported from vendor kernel as a stop gap measure for developers until proper
> mainline ethernet driver is developed.
Yes

>
> Best regards,
> Jernej
>
>
>
>


-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/

  reply	other threads:[~2021-06-06 16:53 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-06  9:03 [RFC PATCH v2 00/11] riscv: Add DMA_COHERENT support for Allwinner D1 guoren
2021-06-06  9:03 ` [RFC PATCH v2 01/11] riscv: asid: Use global mappings for kernel pages guoren
2021-06-06  9:03 ` [PATCH V5 1/3] riscv: " guoren
2021-06-06  9:03 ` [PATCH V5 2/3] riscv: Add ASID-based tlbflushing methods guoren
2021-06-06 14:38   ` Christoph Hellwig
2021-06-06  9:03 ` [RFC PATCH v2 02/11] riscv: asid: " guoren
2021-06-06  9:04 ` [RFC PATCH v2 03/11] riscv: asid: Optimize tlbflush coding convention guoren
2021-06-06  9:04 ` [PATCH V5 3/3] riscv: tlbflush: Optimize " guoren
2021-06-06  9:04 ` [RFC PATCH v2 04/11] riscv: pgtable: Fixup _PAGE_CHG_MASK usage guoren
2021-06-06  9:04 ` [RFC PATCH v2 05/11] riscv: pgtable: Add custom protection_map init guoren
2021-06-06  9:04 ` [RFC PATCH v2 06/11] riscv: pgtable: Add DMA_COHERENT with custom PTE attributes guoren
2021-06-06 14:39   ` Christoph Hellwig
2021-06-06 15:08     ` Guo Ren
2021-06-06 17:22   ` Nick Kossifidis
2021-06-07  6:19     ` Christoph Hellwig
2021-06-06  9:04 ` [RFC PATCH v2 07/11] riscv: cmo: Add dma-noncoherency support guoren
2021-06-06  9:04 ` [RFC PATCH v2 08/11] riscv: cmo: Add vendor custom icache sync guoren
2021-06-06  9:04 ` [RFC PATCH v2 09/11] riscv: soc: Initial DTS for Allwinner D1 NeZha board guoren
2021-06-06 16:26   ` Jernej Škrabec
2021-06-06 17:05     ` Guo Ren
2021-06-07  3:44     ` Guo Ren
2021-06-07  7:27       ` Maxime Ripard
2021-06-07  7:53         ` Guo Ren
2021-06-07  7:24   ` Maxime Ripard
2021-06-07  8:07     ` Guo Ren
2021-06-14 15:33       ` Maxime Ripard
2021-06-14 16:28         ` Guo Ren
2021-06-14 16:31           ` Jernej Škrabec
2021-06-06  9:04 ` [RFC PATCH v2 10/11] riscv: soc: Add Allwinner SoC kconfig option guoren
2021-06-07  7:19   ` Maxime Ripard
2021-06-07  7:27     ` Arnd Bergmann
2021-06-07  7:45       ` Guo Ren
2021-06-07  7:43     ` Guo Ren
2021-06-07 12:12       ` Maxime Ripard
2021-06-07 12:39         ` Guo Ren
2021-06-06  9:04 ` [RFC PATCH v2 11/11] riscv: soc: Allwinner D1 GMAC driver only for temp use guoren
2021-06-06 10:50   ` Andre Przywara
2021-06-06 15:32     ` Guo Ren
2021-06-06 15:39       ` Jernej Škrabec
2021-06-06 15:41         ` Guo Ren
2021-06-06 16:16   ` Arnd Bergmann
2021-06-06 16:32     ` Jernej Škrabec
2021-06-06 16:53       ` Guo Ren [this message]
2021-06-06 16:53     ` Guo Ren
2021-06-06 16:29 ` [RFC PATCH v2 00/11] riscv: Add DMA_COHERENT support for Allwinner D1 Jernej Škrabec
2021-06-06 16:54   ` Guo Ren
2021-06-06 17:14     ` Jernej Škrabec
2021-06-06 23:42       ` Guo Ren
2021-06-07  3:44 ` Anup Patel
2021-06-07  4:36   ` Guo Ren

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